Bike details
Overview
Key information split into simple groups.
Bike summary
-
-
Frame Steel -
Wheels 29" -
Travel Front 120mm -
Fork Fox Factory Float 34
-
Groupset X01, X1 -
Suspension Hardtail -
Drivetrain 1 × 12 -
Brakes Hydraulic Disc
Sizing
Recommended size guide.
SM
158cm - 171cm
MD
168cm - 180cm
LG
178cm - 189cm
XL
186cm - 199cm
Parts list
Components
Main components, grouped by system.
Bike components
Frame
Frame
Chromoly
Suspension Fork
FOX 34 Factory Float FIT4, Kashima coating, EVOL air canister, 3-position compression adjustment
Rear Shock
N/A
Drivetrain
Rear Derailleur
SRAM Eagle X01, 12-speed
Front Derailleur
N/A
Shift Levers
SRAM Eagle X01, 12-speed
Cassette
SRAM XG-1295, 10-50 tooth
Crank
SRAM X1 Carbon
Bottom Bracket
Pressfit
Chain
SRAM X01 Eagle, 12-speed
Chain Guide
N/A
Pedals
N/A
Wheels
Front Hub
Stan's NoTubes Neo/ZTR Arch MK3, 15mm x 110mm, 12mm x 148mm
Rear Hub
Stan's NoTubes Neo/ZTR Arch MK3, 15mm x 110mm, 12mm x 148mm
Rims
Stan's NoTubes Neo/ZTR Arch MK3
Tires
Front: Maxxis Ardent 2.4", dual compound, tubeless ready, Rear: Maxxis Ardent 2.25", dual compound, tubeless ready
Brakes
Brakes
SRAM Guide RSC, 180mm front / 160mm rear rotors
Brake Levers
SRAM Guide RSC
Cockpit
Stem
Race Face Turbine Basic 35, 50mm length
Handlebar
Race Face SixC 35, 820mm width
Grips
Niner Grrrips, nylon flanges
Headset
Niner headset, zero-stack SHIS, ZS44/28.6, ZS56/40
Seat
Saddle
Niner Custom TR, carbon-titanium rails, custom Niner graphic
Seatpost
KS Lev Integra
Fit data
Geometry
Numbers for sizing and ride feel.
| Size | SM | MD | LG | XL |
|---|---|---|---|---|
| Stack Reach Ratio | 1.5 mm | 1.46 mm | 1.43 mm | 1.41 mm |
| Bottom Bracket Height | 322 mm | 322 mm | 322 mm | 322 mm |
| Front Center | 696 mm | 714 mm | 740 mm | 767 mm |
| Rake | 54 mm | 53 mm | 54 mm | 54 mm |
| Trail | 93 mm | 94 mm | 93 mm | 93 mm |
| Stack | 607 mm | 616 mm | 630 mm | 648 mm |
| Reach | 406 mm | 421 mm | 441 mm | 461 mm |
| Top Tube Length | 591 mm | 599 mm | 623 mm | 648 mm |
| Seat Tube Angle | 74 ° | 74 ° | 74 ° | 74 ° |
| Seat Tube Length | 396 mm | 421 mm | 485 mm | 533 mm |
| Head Tube Angle | 68 ° | 68 ° | 68 ° | 68 ° |
| Head Tube Length | 100 mm | 110 mm | 125 mm | 145 mm |
| Chainstay Length | 423 mm | 423 mm | 423 mm | 423 mm |
| Wheelbase | 1114 mm | 1132 mm | 1158 mm | 1185 mm |
| Bottom Bracket Drop | 52 mm | 52 mm | 52 mm | 52 mm |
| Standover Height | 717 mm | 735 mm | 787 mm | 826 mm |
| Wheels | 29" | 29" | 29" | 29" |
| Rider Min Height | 158 cm | 168 cm | 178 cm | 186 cm |
| Rider Max Height | 171 cm | 180 cm | 189 cm | 199 cm |
About this model
SIR 9 29 4-Star is part of the Niner Sir model. Niner released 44 bikes variations of this model so far. Check out the entire range from 2018 of this model, by clicking this link.
Model range prices
Niner SIR 9 27.5+ 1-Star 2018 is the most economical model, with a starting price of 2300$. Niner SIR 9 5-STAR 2018 on the other hand costs 5950$, and is the most expensive model.
Safety
When you go for a ride, don’t forget to put your helmet on. Moreover, ride with traffic, not against it. This will help you stay visible to drivers and also makes it easier for them to see you.
Trail bikes average price
Our math shows that the average cost of a dependable Trail bike is 2762$. However, even though the average price of a Trail bike is lower, you might still be able to get a top-quality bike. To make sure you don’t pay a higher amount than normal for your bike, always do some components analysis and read reviews.
Furthermore, if we have a quick look at this model’s cost, we can see that at its release date the price was 4950$. If we compare this with the average Trail bike cost we notice that the price is 79.22% more expensive.
SIR 9 29 4-Star components
Fork
The SIR 9 29 4-Star comes factory-installed with the Fox Factory Float 34 fork. This has a travel range of 120mm. Bike forks are perfect to absorb shocks and provide a great riding experience overall. In short, make sure you choose one with a decent fork when you purchase your dream bike.
Wheels size
When it comes to wheels, the SIR 9 29 4-Star bike is equipped with the 29″ aluminum model. These wheels are more forgiving when you go over roots, rocks, bumps, or other obstacles you encounter on your ride. However, the 29″ wheels will add a little more weight to the bike itself.
Brakes
When you want to stop the bike in time, the brakes are vital. The SIR 9 29 4-Star has Hydraulic Disc brakes. These kinds of brakes are among the most popular models used on bikes. To sum up, these are ideal for anyone.
Sizes
There are 4 sizes available for this model. Rider height can be anywhere between 158 cm – 199 cm (5.18 ft – 6.53 ft). In conclusion, you won’t have a problem finding one that suits you.
Dropper post
The Niner model is also equipped with a dropper post. If you are a technical rider, a dropper post is essential. A dropper post provides increased safety while riding. The lever system, allows you to move your saddle up and down, which is very useful on climbs and descends.